Popcorn popper



FIG. 1 is a front isometric view of a popcorn popper showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof.

The rear side is a mirror image of the front side, and the left and right sides are similar to the front and rear sides. 

The ornamental design for a popcorn popper, as shown and described. 